Glenn Seaborg was a leading nuclear physicist based out of UC Berkeley. Starting in the 1930's his work was crucial for discovering plutonium and the next half dozen transuranic elements. A friend of no less an eminence than Robert Oppenheimer, Seaborg's long career spanned all the way through the 90's until his death right before Y2k.

He was the first person to have an element named after him while still alive. While he himself is credited with leading the experiments that yielded the new element in 1974 the first atoms were actually created by a rival Russian team a few months earlier though their work was deemed insufficient by the scientific body that reviewed these claims. As an olive branch, Dr. Seaborg suggested that the new element carry the name suggested by the Russian team but his wishes were overridden when the dispute was settled two decades later.

Not one atom of Sg is contained in this acrylic cube. Just in case you thought you were actually buying some. It's just decoration ok? :-)